Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

596288565013A Datasheet(PDF) 12 Page - Analog Devices

Part # 596288565013A
Description  Very Low Noise Quad Operational Amplifier
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

596288565013A Datasheet(HTML) 12 Page - Analog Devices

Back Button 596288565013A Datasheet HTML 8Page - Analog Devices 596288565013A Datasheet HTML 9Page - Analog Devices 596288565013A Datasheet HTML 10Page - Analog Devices 596288565013A Datasheet HTML 11Page - Analog Devices 596288565013A Datasheet HTML 12Page - Analog Devices 596288565013A Datasheet HTML 13Page - Analog Devices 596288565013A Datasheet HTML 14Page - Analog Devices 596288565013A Datasheet HTML 15Page - Analog Devices 596288565013A Datasheet HTML 16Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 12 / 16 page
background image
REV. B
OP470
–12–
CAPACITIVE LOAD DRIVING AND POWER
SUPPLY CONSIDERATIONS
The OP470 is unity-gain stable and is capable of driving large
capacitive loads without oscillating. Nonetheless, good supply
bypassing is highly recommended. Proper supply bypassing
reduces problems caused by supply line noise and improves the
capacitive load driving capability of the OP470.
In the standard feedback amplifier, the op amp’s output resistance
combines with the load capacitance to form a low pass filter that
adds phase shift in the feedback network and reduces stability.
A simple circuit to eliminate this effect is shown in Figure 11.
The added components, C1 and R3, decouple the amplifier
from the load capacitance and provide additional stability. The
values of C1 and R3 shown in Figure 11 are for a load capaci-
tance of up to 1000 pF when used with the OP470.
R1
100 *
*
SEE TEXT
R3
50
OP470
C5
0.1 F
*
C4
10 F
+
V–
VOUT
CL
1000pF
C1
1000pF
R2
VIN
PLACE SUPPLY DECOUPLING
CAPACITORS AT OP470
C3
0.1 F
C2
10 F
+
V+
Figure 11. Driving Large Capacitive Loads
In applications where the OP470’s inverting or noninverting
inputs are driven by a low source impedance (under 100
W) or
connected to ground, if V+ is applied before V–, or when V is
disconnected, excessive parasitic currents will flow. Most applica-
tions use dual tracking supplies and with the device supply pins
properly bypassed, power-up will not present a problem. A source
resistance of at least 100
W in series with all inputs (Figure 11)
will limit the parasitic currents to a safe level if V– is discon-
nected. It should be noted that any source resistance, even 100
W,
adds noise to the circuit. Where noise is required to be kept at a
minimum, a germanium or Schottky diode can be used to clamp
the V- pin and eliminate the parasitic current flow instead of
using series limiting resistors. For most applications, only one
diode clamp is required per board or system.
UNITY-GAIN BUFFER APPLICATIONS
When Rf
£ 100 W and the input is driven with a fast, large
signal pulse(> 1 V), the output waveform will look as shown
in Figure 12.
2V/ s
OP470
R1
Figure 12. Pulsed Operation
During the fast feedthrough-like portion of the output, the input
protection diodes effectively short the output to the input, and a
current, limited only by the output short-circuit protection, will
be drawn by the signal generator. With Rf
£ 500 W, the output
is capable of handling the current requirements (IL < 20 mA at
10 V); the amplifier will stay in its active mode and a smooth
transition will occur.
When Rf > 3 k
W, a pole created by Rf and the amplifier’s input
capacitance (2 pF) creates additional phase shift and reduces
phase margin. A small capacitor (20 pF to 50 pF) in parallel
with Rf helps eliminate this problem.
APPLICATIONS
Low Noise Amplifier
A simple method of reducing amplifier noise by paralleling
amplifiers is shown in Figure 13. Amplifier noise, depicted in
Figure 14, is around 2 nV/
÷Hz @ 1 kHz (R.T.I.). Gain for each
paralleled amplifier and the entire circuit is 1000. The 200
W
resistors limit circulating currents and provide an effective out-
put resistance of 50
W. The amplifier is stable with a 10 nF
capacitive load and can supply up to 30 mA of output drive.
R2
50k
1/4
OP470E
+15V
–15V
R3
200
R1
50
VIN
R5
50k
1/4
OP470E
R6
200
R4
50
R8
50k
1/4
OP470E
R9
200
R7
50
R11
50k
1/4
OP470E
R12
200
R10
50
VOUT = 1000VIN
Figure 13. Low Noise Amplifier


Similar Part No. - 596288565013A

ManufacturerPart #DatasheetDescription
logo
Analog Devices
596288565013A AD-596288565013A Datasheet
3Mb / 16P
   Very Low Noise Quad Operational Amplifier
REV. B
596288565013A AD-596288565013A Datasheet
3Mb / 16P
   Very Low Noise Quad Operational Amplifier
REV. B
More results

Similar Description - 596288565013A

ManufacturerPart #DatasheetDescription
logo
Analog Devices
OP470 AD-OP470_15 Datasheet
3Mb / 16P
   Very Low Noise Quad Operational Amplifier
OP470GPZ AD-OP470GPZ Datasheet
3Mb / 16P
   Very Low Noise Quad Operational Amplifier
REV. B
5962-88565012A AD-5962-88565012A Datasheet
3Mb / 16P
   Very Low Noise Quad Operational Amplifier
REV. B
5962R8856501VCA AD-5962R8856501VCA Datasheet
248Kb / 5P
   Very low noise, quad, operational amplifier
REV. B
OP-470 AD-OP-470 Datasheet
587Kb / 15P
   VERY LOW NOISE QUAD OPERATIONAL AMPLIFIER
OP470AY AD-OP470AY Datasheet
771Kb / 16P
   Very Low Noise Quad Operational Amplifier
REV. B
logo
Intersil Corporation
HS-OP470ARH INTERSIL-HS-OP470ARH Datasheet
27Kb / 2P
   Radiation Hardened, Very Low Noise Quad Operational Amplifier
logo
STMicroelectronics
MC33079 STMICROELECTRONICS-MC33079_08 Datasheet
142Kb / 12P
   Low noise quad operational amplifier
logo
National Semiconductor ...
LM837 NSC-LM837 Datasheet
414Kb / 8P
   Low Noise Quad Operational Amplifier
logo
STMicroelectronics
TL074 STMICROELECTRONICS-TL074_V01 Datasheet
1Mb / 18P
   Low-noise JFET quad operational amplifier
November 2013
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com